feat(vite): source maps for library build, optimizeDeps for peer packages, disable minification for library output

[k-deejah]

Problem

1. vite.config.ts has no source map configuration for the library build — consumers who debug the library in their devtools see minified code with no source maps. Adding build.sourcemap: true would make library debugging significantly easier.

2. vite.config.ts has no optimizeDeps configuration — sorokit-core and @creit.tech/stellar-wallets-kit are large ESM packages that Vite pre-bundles every cold start. Explicitly listing them in optimizeDeps.include reduces cold-start time in consumer projects.

3. vite.config.ts does not set build.minify to false for the library build — minification of a library makes debugging harder and increases the chance of variable name collisions in consumers' bundles. Library builds should prefer minify: false (or "esbuild" with keepNames: true).

Solution

1. Add build.sourcemap: true to the library config.
2. Add optimizeDeps: { include: ["sorokit-core", "@creit.tech/stellar-wallets-kit"] }.
3. Set build.minify: false for the library output format.

Acceptance Criteria

• dist/sorokit-ui.es.js.map is generated after npm run build
• Consumer projects pre-bundle sorokit-core without errors
• Library output is unminified (readable variable names)
• npm run build passes

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Note for Contributors: Write a clear PR description. Show the dist/ directory listing with source maps and confirm the output is readable.

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Hello Maintainer, this looks like something I can tackle confidently. I'll make sure the implementation matches your acceptance criteria.

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